First, this is really cool. Grats for putting it together. Next, I would say that this falls into a category of app that I like to call "Discovery". There is just so much content of every flavor out there that Discovery apps will carve out an entire niche for every niche of people out there. Have you thought about adding a log in that would allow people to simply click +(more) or -(less) for each item presented? Thereby allowing you to hone your recommendations...